On  May 21th, 2011 St. Petersburg's museums, large and small, open their doors for 12 wonderful hours from six p.m. to six a.m. For the first time there will be a common theme “Space” to honour the 50^th anniversary of Gargarin’s journey into the cosmos. Curators from each of the 50 plus institutions are preparing special programmes such as workshops, author tours, plays, concerts and many others.  Tickets can be purchased at any one of the participating museums and are valid for all other locations throughout the evening.